Dennis J. Chirhart

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West St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Retroreflective sheeting with controlled cap-Y
- Patent number 7,329,447
- Issue date Feb 12, 2008
- 3M Innovative Properties Company
- Dennis J. Chirhart
- G02 - OPTICS
Information Patent Grant
Cube corner retroreflective article with enhanced pigmentation
- Patent number 6,325,515
- Issue date Dec 4, 2001
- 3M Innovative Properties Company
- James C. Coderre
- G02 - OPTICS
Information Patent Grant
Retroreflective sheeting with backing film
- Patent number 4,983,436
- Issue date Jan 8, 1991
- Minnesota Mining and Manufacturing Company
- Terry R. Bailey
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method for making embossed information plate having retroreflective...
- Patent number 4,919,741
- Issue date Apr 24, 1990
- Minnesota Mining and Manufacturing Company
- Dennis J. Chirhart
- B44 - DECORATIVE ARTS

Patents Applicationslast 30 patents

Information Patent Application
FORMATION OF RETROREFLECTIVE SHEETING WITH CONTROLLED CAP-Y
- Publication number 20070048501
- Publication date Mar 1, 2007
- 3M Innovative Properties Company
- Dennis J. Chirhart
- G02 - OPTICS
Information Patent Application
Retroreflective sheeting with controlled cap-Y
- Publication number 20050221042
- Publication date Oct 6, 2005
- 3M Innovative Properties Company
- Dennis J. Chirhart
- G02 - OPTICS